Here are the reasons I believe we all love him:
1. He is SEXY!!!!
2. He has that bad boy thing going and nobody can resist that
3. He is flirtatious
4. He is dreamy and the ideal kind of guy that every girl wants to tame and have love them.
5. Kitty-cat (Guys and girls love the opposite gender with kitty cat features. Who couldn't)
6. He is cool..... really really cool. (He is so relaxed and cares so much about Amu without admitting it)